* {
  margin: 0;
  padding: 0;
  font-family: sans-serif,Helvetica Nueu,Helvetica,Arial,微软雅黑;
  font-size: 12px;
  -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
}

body {
  width: 320px;
  margin: 0 auto;
}

img {
  display: inline-block;
  border: none;
}

.hide {
  display: none;
}

.clear {
  clear: both;
}

.f_l {
  float: left;
}

.f_r {
  float: right;
}

.p_r {
  position: relative;
}

.p_a {
  position: absolute;
}

.w_320 {
  width: 320px;
}

.bold {
  font-weight: bold;
}

.pa_bo_10 {
  padding-bottom: 10px;
}

.m_l_r_auto {
  margin-left: auto;
  margin-right: auto;
}

.m_t_0 {
  margin-top: 0;
}

.h_30 {
  height: 30px;
}

.h_25 {
  height: 25px;
}

.letter_spacing0 {
  letter-spacing: 0px;
}

.text_center {
  text-align: center;
}